Spain Quantum Computing Companies 2026: Complete Vendor Guide

The leading spain quantum computing companies in 2026 sit inside an ecosystem that has moved quickly from research strength to national strategy, anchored by the EUR 808M Quantum Technologies Strategy for Spain and by the Quantum Spain initiative that put the country’s first quantum computer inside the Barcelona Supercomputing Center. Ten organisations define the spain quantum computing companies in this guide: Multiverse Computing (San Sebastian, quantum-inspired software), Qilimanjaro Quantum Tech (Barcelona, analog hardware), the Barcelona Supercomputing Center (national quantum-HPC host), LuxQuanta (Castelldefels, quantum key distribution), Quside (Castelldefels, quantum randomness), GMV (Madrid, quantum software and space QKD), VLC Photonics (Valencia, photonic chips), ICFO (Castelldefels, photonics research), QCentroid (Bilbao, quantum-as-a-service), and QuantumPath (Basque Country, quantum software). Why Spain became a serious quantum player Spain spent the past decade building quantum-research strength before it built a quantum industry, and the photonics community around Barcelona was the foundation. The ICFO photonics institute, the Barcelona Supercomputing Center, and several strong university physics groups produced the people and the results that the spain quantum computing companies were later built from. For a long time that strength was mostly academic, visible in publications rather than in funded companies. What changed in the 2020s was the arrival of money and strategy. Multiverse Computing demonstrated that a Spanish quantum company could raise European-scale venture capital, the Quantum Spain initiative put a real quantum computer inside a national supercomputing centre, and in 2025 the government launched a dedicated EUR 808M quantum strategy. That combination turned a research base into a commercial ecosystem, and the spain quantum computing companies now span quantum-inspired software, analog hardware, quantum communication, photonic chips, and enterprise platforms rather than living only inside university laboratories.

The Quantum Technologies Strategy and Quantum Spain Spain now has two complementary government instruments. The newer one is the Quantum Technologies Strategy for Spain, launched in April 2025 with a budget of roughly EUR 808M drawn from European structural funds and the national recovery plan, and structured around three pillars covering quantum computing, quantum communication, and quantum sensing. With projected private co-investment, the strategy frames a total quantum effort in Spain approaching EUR 1.5B, which places the country among the more seriously funded quantum nations in Europe. The earlier instrument is Quantum Spain, an initiative funded through the national recovery plan and coordinated by the Barcelona Supercomputing Center, which brings together more than two dozen institutions including the nodes of the Spanish Supercomputing Network. Quantum Spain is the programme that delivered the country’s first quantum computer and that ties the spain quantum computing companies to a shared national platform. Together the two instruments give Spain both a long-term strategic framework and a concrete, already-operating piece of national quantum infrastructure. The top spain quantum computing companies Ten organisations define the spain quantum computing companies covered in this guide. One is a national infrastructure host (the Barcelona Supercomputing Center) and one is a public research institute that spawned several startups (ICFO). One builds analog quantum hardware (Qilimanjaro), and the rest are software and applications companies (Multiverse Computing, QCentroid, QuantumPath), quantum-communication and randomness vendors (LuxQuanta, Quside), a photonic-chip design house (VLC Photonics), and a large aerospace-and-IT group with a quantum practice (GMV).

The Quantum Spain initiative coordinates the national programme behind the spain quantum computing companies ecosystem. Independent directories of the spain quantum computing companies list a similar shortlist of names. The profiles below cover the leading organisations in depth.

Multiverse Computing Quantum-inspired software · San Sebastian, Spain · Founded 2019 Multiverse Computing is the San Sebastian-based software vendor founded in 2019, and it is by a wide margin the largest of the spain quantum computing companies by funding. The company builds quantum and quantum-inspired software using tensor networks, the mathematical technique that lets a classical computer approximate quantum-scale problems, and its two flagship products are Singularity for optimisation and CompactifAI for compressing large language models. CompactifAI in particular has turned tensor-network maths into a commercial AI-efficiency product, which is what attracted strategic investors from the computing industry. Multiverse raised a Series B of roughly EUR 189M in June 2025, led by Bullhound Capital with HP Tech Ventures, Forgepoint Capital, CDP Venture Capital, Santander, Quantonation, and Toshiba among the backers. The round is one of the largest quantum-software financings in Europe, and it makes Multiverse the commercial flagship of the Spain quantum companies. multiversecomputing.com → Qilimanjaro Quantum Tech Analog quantum computers · Barcelona, Spain · Founded 2019 Qilimanjaro Quantum Tech is the Barcelona-based hardware vendor founded in 2019 as a spin-off from the Barcelona Supercomputing Center, the Institute for High Energy Physics, and the University of Barcelona. The company builds full-stack analog quantum computers, an approach that runs a problem directly on the natural dynamics of the qubits rather than decomposing it into a long sequence of discrete gates, which can suit optimisation problems well. Qilimanjaro won the EUR 8.5M EuroHPC contract to supply MareNostrum-Ona, an analog quantum-annealing system that is being installed alongside the MareNostrum supercomputer in Barcelona, and it has opened a multimodal quantum data centre in the city. The company also received Catalan-government backing through Avancsa, and it is the deepest domestic hardware bet among the Spain quantum companies. qilimanjaro.tech → Barcelona Supercomputing Center (BSC) National quantum-HPC host · Barcelona, Spain · Quantum Spain coordinator The Barcelona Supercomputing Center is Spain’s national supercomputing facility and the coordinating institution of the Quantum Spain initiative, which makes it the infrastructure anchor of the Spain quantum companies ecosystem. In February 2025 the BSC presented Spain’s first quantum computer, a superconducting system built entirely with European technology and integrated into the MareNostrum 5 supercomputer, with a roadmap scaling from a handful of qubits toward roughly thirty. The centre is also receiving MareNostrum-Ona, the Qilimanjaro-built analog quantum annealer procured through EuroHPC. By co-locating quantum processors with one of Europe’s most powerful supercomputers, the BSC gives Spanish researchers and companies a national platform for the hybrid quantum-classical workflows that every near-term quantum algorithm depends on, and it ties the Spain quantum companies into the wider EuroHPC network. bsc.es → LuxQuanta Quantum key distribution · Castelldefels, Spain · Founded 2021 LuxQuanta is the Castelldefels-based quantum-communication vendor founded in 2021 as a spin-off from ICFO, the Institute of Photonic Sciences, and it builds quantum-key-distribution hardware using a continuous-variable approach. Most QKD systems detect individual photons, but LuxQuanta’s continuous-variable method measures the properties of weak laser light with standard telecom detectors, which the company argues makes the technology easier and cheaper to deploy on existing fibre networks. Its flagship NOVA LQ product reached a second generation launched in 2025, and the company closed an EUR 8M Series A in October 2025 led by Big Sur Ventures with the EIC Fund, GMV, Corning, and others participating. LuxQuanta protects communications against the future threat of quantum-enabled decryption, and it anchors the quantum-security layer of the Spain quantum companies ecosystem. luxquanta.com → Quside Quantum randomness hardware · Castelldefels, Spain · Founded 2017 Quside is the Castelldefels-based hardware vendor founded in 2017, another spin-off from the ICFO photonics institute, and it builds quantum random number generators that produce genuinely unpredictable numbers from a quantum physical process. Random number quality is a foundational problem in both security and computation, because predictable or biased numbers weaken cryptographic keys and distort large-scale simulations, and a hardware quantum source removes that weakness at the root. Quside’s Garnet and Nellite product families target cybersecurity and high-performance computing customers, and its randomness technology has achieved formal Spanish national-security qualification. Backed by investors including Bullnet Capital, Trumpf Ventures, and the EIC Fund, Quside is one of the most established hardware companies among the Spain quantum companies and a steady supplier of the randomness layer that both security and simulation depend on. quside.com → GMV Quantum software + space QKD · Tres Cantos, Madrid · Aerospace and IT group GMV is the Madrid-based aerospace and information-technology group that runs one of the most active corporate quantum practices among the Spain quantum companies. The company works across quantum software, post-quantum cybersecurity, and space-based quantum key distribution, and it co-delivered the European-technology quantum computer now installed at the Barcelona Supercomputing Center. GMV leads the Q-MIND project funded by the Community of Madrid, and it has run an ESA-backed feasibility study, named Caramuel, into quantum key distribution from a geostationary satellite. The combination of a large engineering organisation, deep aerospace customer relationships, and a serious quantum programme gives GMV a role that pure-play startups cannot match, and it connects the Spain quantum companies to the European space sector and to government cybersecurity work. gmv.com → VLC Photonics Photonic integrated circuits · Valencia, Spain · Founded 2011 VLC Photonics is the Valencia-based photonics company founded in 2011 as a spin-off from the Polytechnic University of Valencia, and since 2020 it has been part of the Hitachi High-Tech group. The company designs and tests photonic integrated circuits, the chips that route and process light, and it has worked on photonic circuits for quantum-communication projects alongside its broader telecom and sensing business. Photonic integration is an important enabling technology for the quantum sector, because compact, manufacturable optical chips are needed for both photonic quantum computing and quantum communication, and a specialist design house lowers the barrier for other companies to build photonic quantum hardware. VLC Photonics gives the Spain quantum companies a deep integrated-photonics design capability backed by a major industrial parent. vlcphotonics.com → ICFO (Institute of Photonic Sciences) Photonics research institute · Castelldefels, Spain · Founded 2002 ICFO, the Institute of Photonic Sciences, is a public research institute near Barcelona founded in 2002, and it is the scientific engine behind much of the Spain quantum companies ecosystem. The institute runs research programmes across quantum optics, quantum communication, and quantum sensing, and it has spun out several of the country’s most important quantum ventures, including LuxQuanta, Quside, and the quantum-repeater startup Arq Quantum Technologies. ICFO is also a key partner in the Quantum Spain initiative and in European quantum-networking efforts such as the Quantum Internet Alliance. By training researchers and turning laboratory results into companies, ICFO functions much as a university physics department does for a national tech cluster, and it explains why so many of the Spain quantum companies sit in the Barcelona photonics community. icfo.eu → QCentroid Quantum-as-a-service platform · Bilbao, Spain · Founded 2022 QCentroid is the Bilbao-based software vendor founded in 2022, and it operates a vendor-neutral quantum-as-a-service platform aimed at helping enterprises adopt quantum computing without committing to a single hardware provider. The platform, which the company describes in terms of quantum operations or QuantumOps, lets a customer develop, benchmark, and run quantum workloads across multiple backends through one interface, which addresses a real problem for enterprises that do not want to bet early on which qubit technology will win. QCentroid has partnered with hardware-focused companies to broaden the backends it can reach, and it sits in the orchestration-and-adoption layer of the Spain quantum companies ecosystem. As part of the growing Basque quantum cluster around Bilbao, QCentroid extends Spanish quantum activity beyond the Barcelona and Madrid centres. qcentroid.xyz → QuantumPath Quantum software development · Basque Country, Spain · Software platform QuantumPath is a Spanish quantum-software platform built in the Basque Country quantum cluster, and it provides tools for designing, building, and deploying quantum and quantum-inspired applications across different hardware backends. The platform focuses on software engineering for quantum, offering a structured way to manage quantum algorithms and quantum-classical applications through their full lifecycle, which is the kind of disciplined tooling enterprises need before they can treat quantum development as ordinary software work. QuantumPath has been used inside Basque regional quantum-ecosystem programmes, and it complements QCentroid in giving the Bilbao area a software-and-platform specialisation. Together these companies show how the Spain quantum companies have spread into a third regional centre, with the Basque Country adding to the established Barcelona and Madrid quantum communities. quantumpath.es → ERZIA Quantum control · Santander, Spain · Founded 1996 ERZIA is an OEM manufacturer of high-performance RF and microwave modules, subsystems, and integrated assemblies serving quantum computing applications. Their high-power amplifiers (HPA) drive microwave control pulses for qubit manipulation (4-8 GHz, 10-50W output), while their low-noise amplifiers (LNA) capture weak readout signals with sub-1 dB noise figures across L-Band through W-Band frequencies critical for quantum system architectures. ERZIA provides essential RF infrastructure for quantum control systems worldwide. www.erzia.com → Quanvia Bilbao, Spain · Founded 2023 Quanvia is based in Bilbao, Spain, focusing on implementing quantum applications and training individuals to enhance their understanding of quantum computing. The company provides quantum computing courses, workshops, and hands-on training programs for businesses and universities. Quanvia helps develop quantum computing talent in the Basque Country and broader Spanish quantum ecosystem. quanvia.com → Quantix Edge Security Post-quantum · Murcia, Spain · Founded 2024 Quantix Edge Security is a joint venture based in Murcia, Spain, formed by SEALSQ (a WISeKey subsidiary), ODIN Solutions, TProtege, and the Spanish government’s SETT regional development agency. Announced in 2024, its goal is to build Europe’s first dedicated post-quantum semiconductor personalisation centre. The Spanish government has committed €19.6M to the Murcia facility, and SEALSQ has signed a $25M revenue agreement with Quantix to develop Spain’s first post-quantum semiconductor personalisation centre. The centre will design, test, and personalise secure chips for IoT, automotive, and medical devices using NIST-standardised PQC algorithms, supporting EU Cyber Resilience Act compliance for connected devices. quantixedges.com → Inspiration-Q Quantum software · Madrid, Spain · Founded 2022 Inspiration-Q is a Madrid-based company that emphasizes the transformative potential of quantum computing while addressing the current challenges of nascent hardware. The company develops quantum software applications and provides quantum computing education and consulting services. Inspiration-Q works to bridge the gap between quantum research and practical business applications in Spain. inspiration-q.com → PlanetAI Space Malaga, Spain · Founded 2022 PlanetAI Space integrates Earth Observation with quantum machine learning to detect underground freshwater sources and environmental patterns from satellite data.

Their Quantum Aqua technology uses hybrid quantum-classical ML to estimate underground water source probabilities, replacing traditional field measurements with large-scale processed satellite information to generate real-time water location maps and contamination warnings. Winner of World Economic Forum’s Quantum for Sustainability challenge in 2025 with funding from Ready2Scale, Madrid Emprende, Village Capital, and others. www.planetai.space → Polytechnic University of Madrid Quantum Division Quantum networking · Madrid, Spain · Founded 1971 The Polytechnic University of Madrid (Universidad Politécnica de Madrid, UPM) is a Spanish public research university founded in 1971 and headquartered in Madrid.

Its Quantum Division participates in Spain’s QKD-GEO quantum key distribution geostationary satellite mission as part of the industrial consortium led by Thales Alenia Space, which is developing quantum communications technology for space-based quantum key distribution systems. UPM brings telecommunications engineering and quantum communications research expertise to satellite QKD development. It collaborates with the Institute of Astrophysics of the Canary Islands, the University of Vigo, Thales Alenia Space, and Hispasat to advance quantum-safe satellite communications, and conducts research in quantum cryptography, quantum optics, and quantum communications protocols for satellite applications. The university serves the European quantum communications research community, quantum technology companies, and government agencies that need quantum networking protocols and satellite QKD systems engineering. It contributes to the Spanish national quantum strategy and the European Quantum Communication Infrastructure (EuroQCI) initiative. www.upm.es → Quantum Mads Quantum software · Bilbao, Spain · Founded 2023 Quantum Mads is a hybrid Quantum Software as a Service (QSaaS) provider based in Bilbao that tackles complex industrial challenges. The company develops quantum algorithms and software tools for optimization, simulation, and machine learning applications. Quantum Mads helps Spanish businesses adopt quantum computing for practical problem-solving in manufacturing, logistics, and energy sectors. quantummads.com → Cryptosasun Post-quantum · Barcelona, Spain · Founded 2022 Cryptosasun is a Spanish quantum security startup developing post-quantum cryptography solutions and quantum-safe security protocols. The company focuses on protecting digital infrastructure from quantum computing threats through advanced encryption technologies. Cryptosasun provides quantum-resistant security solutions for enterprises and government agencies in Spain and across Europe. cryptosasun.com → g2-Zero Photonic · Madrid, Spain · Founded 2020 G2-Zero is a Madrid-based quantum technology startup, founded in 2020, that develops plug-and-play single photon sources and semiconductor-based photonic quantum components. A spin-off of the Institute of Micro and Nanotechnology of the Spanish National Research Council (IMN-CSIC) and the Technical University of Madrid (UPM), the company builds single photon sources that are purely electrical, vibration-resistant, and alignment-free. G2-Zero was selected for NATO’s Defence Innovation Accelerator for the North Atlantic (DIANA) program and has received investment from FI Nvest, Hamamatsu Corporate Venture Capital, and Deep Tech Lab – Quantum. Its technology addresses needs in the emerging market for quantum technologies, including quantum communications, quantum computing, and quantum sensing. g2-zero.com → Cellnex Quantum Division Post-quantum · Barcelona, Spain · Founded 2015 Cellnex Telecom is a Spanish telecommunications infrastructure and services company founded in 2015 and headquartered in Barcelona.

Its Quantum Division supports the development of quantum-safe satellite communications and quantum networking infrastructure. Cellnex participates in Spain’s QKD-GEO quantum key distribution geostationary satellite mission, led by Thales Alenia Space and Hispasat, analyzing real use cases with the banking sector and terrestrial operators for quantum-secure communications. It collaborates with Hispasat, Banco de Santander, BBVA, and Telefónica to define business plans for integrating quantum-safe satellite and terrestrial networks. The company operates telecommunications tower infrastructure across Europe, which can serve as a backbone for quantum-safe communications networks. Cellnex invests in next-generation secure communications technologies including quantum key distribution and post-quantum cryptography. It serves telecommunications operators, mobile network operators, broadcasters, and infrastructure sectors that need quantum-safe communications and tower infrastructure to support quantum networking across European markets. www.cellnex.com → Telefonica Post-quantum · Madrid, Spain · Founded 1924 Telefonica S.A. is a Spanish multinational telecommunications company founded in 1924 and headquartered in Madrid. The company explores quantum technologies for telecommunications, including quantum key distribution (QKD) for secure communications, quantum networking, and post-quantum cryptography. Telefonica works with quantum technology providers and research institutions to deploy quantum communication networks across Spain and Latin America, and it invests in quantum-safe security to prepare its infrastructure for post-quantum transitions. The company serves telecommunications markets across Europe and Latin America, including enterprise customers, government agencies, and critical infrastructure sectors that require quantum-safe communications. This work contributes to European quantum communications infrastructure and positions Spain as a quantum communications leader in Europe and Latin America. In January 2025, Telefonica Tech signed a collaboration agreement with IBM on quantum-safe technology. In early 2026, Telefonica and IQM Quantum Computers were selected by Galicia’s CESGA supercomputing center to deploy a 54-qubit IQM Radiance and a 5-qubit IQM Spark, Spain’s first IQM quantum computers. www.telefonica.com → Arq Quantum Technologies Barcelona, Spain · Founded 2025 Arq Quantum Technologies is a Barcelona-based deep-tech startup building quantum repeater hardware for the quantum internet. It was formally incorporated in September 2025 and publicly launched in March 2026. Arq uses rare-earth ions to enable massively multiplexed quantum network nodes, a requirement for long-distance quantum communication. The company contributes to the Quantum Internet Alliance (QIA) project, developing hardware for linking quantum computers and building functional prototype quantum networks. It treats rare-earth-based quantum repeater technology as the path to scalable quantum networks. arqquantum.com → Hispasat Madrid, Spain · Founded 1989 Hispasat is Redeia’s satellite services operator, founded in 1989 and headquartered in Madrid, Spain. It operates satellites providing telecommunications services across Europe, the Americas, and North Africa. In January 2025, Hispasat partnered with Thales Alenia Space to begin the development, manufacturing, verification, and validation phase of the QKD-GEO prototype, Spain’s quantum key distribution system from geostationary orbit. The QKD-GEO mission has a budget of 103.5 million euros and a 24-month timeline to develop components for quantum key distribution from geostationary orbit, including a quantum payload for a geostationary satellite and the associated ground segment. Hispasat is responsible for designing the geostationary mission and defining the business plan, with support from Banco de Santander, BBVA, Telefonica, and Cellnex analyzing real use cases with the banking sector and terrestrial operators. A field test campaign is planned between the Spanish islands of La Palma and Tenerife, covering a 140-km atmospheric link. Hispasat serves telecommunications operators, government agencies, financial institutions, and critical infrastructure that need quantum-secure satellite communications. www.hispasat.com → aQuantum Quantum software · Madrid, Spain · Founded 2021 AQuantum is a Madrid-based research, development, consulting and services firm specializing in quantum software engineering and programming. The company provides quantum algorithm development, quantum software consulting, and training services to enterprises and research institutions. AQuantum helps organizations understand and implement quantum computing solutions for their specific business needs. aquantum.es → What the lineup reveals The first pattern is that Spain’s commercial strength sits in software rather than in raw quantum hardware. Multiverse Computing is the clearest example, because its quantum-inspired tensor-network software, and especially the CompactifAI product for compressing AI models, found a real market and attracted European-scale funding. The Spain quantum companies have, so far, been better at turning quantum mathematics into sellable software than at building large qubit processors, and that is a sensible position for an ecosystem of this size. Photonics is the research core The second pattern is the central role of photonics. ICFO, the Barcelona photonics institute, spun out LuxQuanta, Quside, and other ventures, VLC Photonics designs the integrated optical chips that quantum communication needs, and the Barcelona region has become a genuine photonics cluster. Because photonics sits beneath quantum communication, quantum sensing, and photonic quantum computing, this research core gives the Spain quantum companies a durable scientific foundation that does not depend on any single qubit technology winning. The ecosystem is spreading The third pattern is geographic spread. Spanish quantum activity began in Barcelona, but it has since extended to San Sebastian, where Multiverse Computing is based, to Madrid, where GMV runs its quantum practice, and to Bilbao, where QCentroid and QuantumPath anchor a Basque Country quantum cluster. A national ecosystem with several regional centres is more resilient than one concentrated in a single city, and the spread shows that the Spain quantum companies have grown into a genuinely national sector. The Barcelona, San Sebastian, Madrid, and Bilbao map The Spain quantum companies cluster around four centres. Barcelona is the largest, home to the Barcelona Supercomputing Center, the ICFO photonics institute, Qilimanjaro, and the ICFO spin-offs LuxQuanta and Quside, with the nearby town of Castelldefels hosting much of the photonics activity. The combination of a national supercomputing centre, a leading research institute, and a cluster of spin-offs makes Barcelona the clear gravitational centre of Spanish quantum technology. The other three centres are more specialised. San Sebastian in the Basque north is home to Multiverse Computing, the largest of the Spain quantum companies by funding, and it benefits from the strong physics community in the region. Madrid is the base for GMV and its quantum software, post-quantum cybersecurity, and space-QKD work, tied to the capital’s aerospace and government sectors. Bilbao anchors a separate Basque Country quantum cluster around QCentroid and QuantumPath, supported by regional innovation programmes. The four centres are well connected, and the national Quantum Spain framework knits them into a single coordinated ecosystem.

The Barcelona Supercomputing Center and MareNostrum The Barcelona Supercomputing Center is the piece of infrastructure that gives Spain a concrete national quantum capability rather than only a strategy document. The centre operates MareNostrum 5, one of the most powerful supercomputers in Europe, and in February 2025 it presented Spain’s first quantum computer, a superconducting system built entirely with European technology and integrated directly into the supercomputer. The system began small, with a roadmap to scale toward roughly thirty qubits, and it was delivered under the Quantum Spain initiative. The BSC is also receiving MareNostrum-Ona, an analog quantum-annealing system built by Qilimanjaro and procured through the EuroHPC programme, which will sit alongside the gate-based machine. Co-locating quantum processors with a major supercomputer matters because every near-term quantum algorithm, from chemistry simulations to optimisation, needs a tight loop between quantum execution and classical post-processing. By providing that environment as a national service, the BSC gives the Spain quantum companies and the country’s researchers a shared platform, and it links Spain into the wider EuroHPC quantum-computing network. When Spain matters for your quantum strategy Quantum-inspired software and AI efficiency If your interest is software you can use today rather than future hardware, Spain is unusually relevant. Multiverse Computing builds quantum-inspired optimisation software and the CompactifAI tool for compressing large language models, both of which run on classical hardware now, and QCentroid and QuantumPath offer platforms for developing and orchestrating quantum applications. Organisations evaluating near-term quantum value, or AI-efficiency techniques drawn from quantum mathematics, should treat the Spain quantum companies as a serious source of working software. Quantum communication and security For quantum-safe communication, Spain has genuine hardware. LuxQuanta builds continuous-variable quantum-key-distribution systems designed for existing fibre networks, Quside builds quantum random number generators with national-security qualification, and GMV works on satellite-based quantum key distribution. Enterprises in finance, telecom, and government that need to plan for the future threat of quantum-enabled decryption will find deployable products and a serious research base among the Spain quantum companies. Research access and the national platform For research and development, the Barcelona Supercomputing Center provides a national quantum-HPC platform with both a gate-based quantum computer and an analog annealer integrated alongside the MareNostrum supercomputer. Combined with the ICFO photonics institute and the Quantum Spain network of institutions, this gives partners a route into hybrid quantum-classical research. A quantum strategy that involves European research collaboration should account for the Spain quantum companies and the shared infrastructure that supports them. Read next Germany quantum companies Netherlands quantum companies Israel quantum companies Top quantum software companies Top quantum hardware companies Frequently asked questions Who are the leading Spain quantum companies in 2026? The Spanish ecosystem is led by Multiverse Computing, the San Sebastian software vendor whose quantum-inspired products raised a Series B of roughly EUR 189M, the largest funding among the Spain quantum companies.

Qilimanjaro Quantum Tech in Barcelona builds analog quantum hardware, and the Barcelona Supercomputing Center hosts Spain’s first quantum computer. LuxQuanta and Quside, both ICFO spin-offs in Castelldefels, cover quantum key distribution and quantum random number generation. GMV in Madrid runs a quantum software and space-QKD practice, VLC Photonics in Valencia designs photonic chips, and QCentroid and QuantumPath provide quantum software platforms from the Basque Country. ICFO, the Barcelona photonics institute, anchors the research base. Together these ten organisations define the Spain quantum companies covered in this guide. What is Quantum Spain? Quantum Spain is a national initiative, funded through Spain’s national recovery plan and coordinated by the Barcelona Supercomputing Center, that brings together more than two dozen institutions including the nodes of the Spanish Supercomputing Network. Its central achievement is the delivery of Spain’s first quantum computer, a superconducting system built with European technology and integrated into the MareNostrum 5 supercomputer in Barcelona. Quantum Spain gives the Spain quantum companies and the national research community a shared quantum-HPC platform rather than leaving each group to build isolated infrastructure. It operates alongside the broader Quantum Technologies Strategy for Spain, the EUR 808M government strategy launched in 2025 that covers quantum computing, communication, and sensing. Does Spain have its own quantum computer? Yes. In February 2025 the Barcelona Supercomputing Center presented Spain’s first quantum computer, a superconducting gate-based system built entirely with European technology and integrated directly into the MareNostrum 5 supercomputer. The machine started small, with a roadmap to scale toward roughly thirty qubits, and it was delivered under the Quantum Spain initiative with companies including Qilimanjaro and GMV involved. The BSC is also receiving MareNostrum-Ona, an analog quantum annealer built by Qilimanjaro and procured through the EuroHPC programme. Having both a gate-based machine and an analog annealer co-located with a major supercomputer gives the Spain quantum companies and Spanish researchers a national platform for hybrid quantum-classical work. What is Multiverse Computing known for? Multiverse Computing, founded in San Sebastian in 2019, is the largest of the Spain quantum companies by funding and is known for quantum and quantum-inspired software built on tensor networks. Its Singularity product targets optimisation problems, and its CompactifAI product uses tensor-network mathematics to compress large language models so they run more efficiently, which turned a quantum technique into a commercial artificial-intelligence product. That AI-efficiency angle attracted strategic investors from the computing industry, and in June 2025 Multiverse raised a Series B of roughly EUR 189M led by Bullhound Capital, with HP Tech Ventures, Forgepoint Capital, CDP Venture Capital, Santander, Quantonation, and Toshiba participating. The round is one of the largest quantum-software financings in Europe. What quantum technologies are Spanish companies strongest in? The Spain quantum companies are strongest in quantum-inspired software and in quantum communication, rather than in large qubit processors. Multiverse Computing leads on quantum-inspired optimisation and AI-compression software, and QCentroid and QuantumPath provide quantum software platforms. On the communication side, LuxQuanta builds continuous-variable quantum-key-distribution hardware, Quside builds quantum random number generators, and GMV works on satellite quantum key distribution. The photonics research institute ICFO supports much of this work, and VLC Photonics designs the integrated optical chips that quantum communication needs.

Qilimanjaro Quantum Tech is the main domestic hardware vendor, building analog quantum computers. This spread reflects Spain’s deep strength in photonics and software. Where are Spain’s quantum companies located? The Spain quantum companies cluster around four centres. Barcelona is the largest, home to the Barcelona Supercomputing Center, the ICFO photonics institute, Qilimanjaro, and the ICFO spin-offs LuxQuanta and Quside, with much of the photonics activity in nearby Castelldefels. San Sebastian in the Basque north hosts Multiverse Computing, the largest Spanish quantum company by funding. Madrid is the base for GMV and its quantum software and space-QKD work. Bilbao anchors a separate Basque Country quantum cluster around QCentroid and QuantumPath. Valencia adds VLC Photonics and its integrated-photonics design work. The national Quantum Spain framework connects these regional centres into a single coordinated ecosystem. How much is Spain investing in quantum computing? Spain launched its Quantum Technologies Strategy in April 2025 with a budget of roughly EUR 808M, drawn from European structural funds and the national recovery plan, and structured around quantum computing, quantum communication, and quantum sensing. With projected private co-investment, the strategy frames a total quantum effort approaching EUR 1.5B. This sits alongside the earlier Quantum Spain initiative, also funded through the recovery plan, which delivered the national quantum computer at the Barcelona Supercomputing Center. The scale places Spain among the more seriously funded quantum nations in Europe, and the funding is the main reason the Spain quantum companies grew from a research base into a commercial ecosystem during the 2020s. How does Spain compare with other European quantum nations? Spain competes through software strength and photonics research rather than through large hardware programmes. Germany runs the deepest continental hardware ecosystem and France runs several processor programmes, while Spain’s clearest commercial success, Multiverse Computing, is a quantum-inspired software company, and its research core is the Barcelona photonics community. The EUR 808M Quantum Technologies Strategy places Spain among the more seriously funded European quantum nations, though below Germany’s multi-billion-euro effort. Spain’s national quantum computer at the Barcelona Supercomputing Center ties it into the EuroHPC network alongside Italy, France, and Germany. Overall, the Spain quantum companies are strongest in quantum-inspired software, quantum communication, and integrated photonics. Stay current. See today’s quantum computing news on Quantum Zeitgeist for the latest breakthroughs in qubits, hardware, algorithms, and industry deals. Tags: